I don't have the brushy mountain ones, but my
own version there of. The two ways I feed them are a) pour syrup directly into comb, or b) inverted jar over cut-out in inner cover. If you do b) stagger the jars so they are as far away from the entrance holes as possible.
Granted I don't overwinter in these, I move them to polystyrene nucs. Your climate is a little warmer than mine, so you may be able to. Not sure how your are built, but mine have enough clearance between the frame tops and the inner covers to fit a pollen patty.